Actually, we all know about warnings or avian flu, but this is particularly about problems related to chickens.
Will the Next Pandemic Start With Chickens?
This spring, a virulent strain of bird flu ripped through U.S. farms. The public hardly noticed. That we could ignore the disease shows just how little we’ve learned about the origin of new viruses.
Typically, a strain of influenza that affects chickens cannot invade human cells, nor vice versa. Thus, for many years, when poultry flocks suffered from “highly pathogenic avian influenza,” or HPAI—the broad name given to any influenza strain that results in rapid and widespread chicken death—no one much worried about the human risk.
The calculus changed in 1997, after an outbreak of bird flu struck Hong Kong.
https://newrepublic.com/article/1676...ckens-bird-flu